// loop entre 1 unica classe
class m
{
    public static void main(String[] args)
    {
    	System.out.println(10);
    }
}



class b extends a
{
}

class a
{
   a a;
   a b;
   public a A(){a = new a(); a = b; return this;}
   public int i(){ return 0; }
}


class E extends b
{
}

class d extends a
{
}

class e extends a
{
}
